Printing-plate clamp



-s. HOLLINGSWORTH. PRINTING PLATE CLAMP. APPLICATION FILED JUNE 5, I920- Patented Jan. 3

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sannnr. HOLLHIGSWORTE, or soo'ron Prams, NEW JERSEY, essrenon 'ro nann NOTE rnnss ooiare w, or rtemrrnnn, new JERSEY, a oonrona'rron on NEW JERSEY.

age ess.

Application filed Janet, 1920.

To all whom it may concern:

Be it known that T, Sinner. Hollandswonri aoitizen of the United States, and. a resident o1"- Scotch Plains, Union County. New Jersey, have invented certain new-and useful Improvements in Printing-Plate Clamps, oi which the following is a specification. 7 r g This invention relates to means for clamping a printing plate on a carrying member and has "for its main object an arrangement whereby with the same construction oi clamping means, an effective clampingof the plate may be obtained regardless of the width of available margin space remaining on the carrying member after the plate has been placed in position; and, with this and other objects in view, the invention consists of the hereinafter described means, a preferred embodiment of which is disclosed in the accompanying drawings in which Fig. 1 is a plan view of a carrying mem ber with a plate clamped in position by the improved clamping means:

Fig. 2 is a vertical sectional view on the line 22 of Fig. 1: r

Fig. 3 shows a vertical section on the line 33 of Fig. 2; and

Fig.4 shows a vertical section on the line 44 of Fig. 2.

The plate carrying member, indicated at 1, may be of any suitable form and is provided with undercut grooves 2 of such char acter and number asmay be found desirable or expedient. In the present embodiment of the invention two pairs of grooves only are shown, and clamping means, generally designated by the reference character 3, are arranged to clamp three sidesof the plate 1-. In the present instance a head clamp 5 engages the remaining side of the plate and it will be understood that a series of openings 6 may be provided in the carrying member so that, by means of-screws 7, said head clamp may be secured in such position on the carrying member as may be desired.

As all of the clamping members 3 are of the same construction only one will be described. 8 is an abutment member seated. in a groove of the carrying member. This abutment member, as here shown, is of a height no greater than the depth of the groove in which it slides, so that it may, if desired, occupy a position beneath and within the confines of the printing plate; Said PRINTING-PLATE CLAMP.

Specification Letters Patent. Patgntgd Jan, 3, 1922;

Serial No. 386,900.

member is also capable of being slidably ad,- justed in its groove or, it maybe removed entirely therefrom; it may also be reversed end for end by removal from and reinserted endwise into the' 'groove in a new position. After it has been properly positioned, it is secured in position by tightening thebinding screw 9, and it then becomes a stationary abutment. 10 indicates a stem having a threaded portion in engagement with the abutment member, and having a head 11, of greater diameter than the stem, located at a point intermediate its ends.

12 is a plate clamping dog slidably mounted in the groove and having a. sleeve portion 13 the opening of which, as here shown, is of a greater diameter than that a position beyond the confines of the printing plate. In that event, the clamping dog may occupy a position at one end of head 11 and in abutting engagement therewith, the unthreaded portion of the stem projecting Fig. 1, the abutment member may occupy idly into the sleeve portion of the clamping dog. It will n be understood that rotation in one direction of the threaded stem will cause it to move lengthwise of the groove and will eii'ect'a sliding movement of the clamping dog into engagement with the plate; and that rotation of the stem in the reverse direction will release the clamping dog from the plate. This arrangement will preferably be followed when there is a wide available marginal portion on the carrying member as shown in the lower part of Fig. 1. When the available marginal portion is relatively narrow, as shown at the sides in Fig.

1. the parts will preferably be assembled as follows: The abutment member will 00- cupy an end for end reversed position bel neath the printing plate and within the con fines thereof. Stem 10 will be removed from engagement with the abutment memher, and its threaded portion inserted through sleeve portion 13 of the clampingdog, said sleeve portion thus occupying a position intermediate the abutment member 7 If, that which ever: way the parts are asdirection. of stem 10 occurs, the clamping dog will I'QlBHSGithG' printing plate. It will be seen, from: an inspection of Fig.

sermbied, head 11 projects beyond the confines ofthe printing plate and thatit; is

therefore always accessible for adjustment to clamp on unolamp the plate' I claim v A plate carrying member having a. groove,

a relatively stat onary abutment member seated in the groove, a stem in threaded engagement with the abutment member, 7 a head. on the; stem atta, point intermediate, its ends, and of greater diameter than that of the stem, a clamping dog slidahley. in said a groove, and a sleeve portion, carried by the dog, for" the idle reception of the stem to admit of the positioning of the dog in engagemel lt with said head at either end thereof," the head being intermediate the abutment member and the clamping dog in one position of the partsyandithe clamping dog'b-eing intermediate thehead and abut: ment member in the reverse" position of the parts. e

Union, and fState of New Jersey, this second day of June, 1920.

SAMUELYHOLLINGSWQRTH Signed Scotch Plainein the county of, 

